Add the ability to use AllowAddressReuse for UDP sockets.

chrome/common/extensions/api/socket.idl

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 namespace socket {
   enum SocketType {
     tcp,
     udp
   };
 
@@ skipping 106 matching lines @@
   callback JoinGroupCallback = void (long result);
 
   callback LeaveGroupCallback = void (long result);
 
   callback SetMulticastTimeToLiveCallback = void (long result);
 
   callback SetMulticastLoopbackModeCallback = void (long result);
 
   callback GetJoinedGroupsCallback = void (DOMString[] groups);
 
+  callback AllowAddressReuseCallback = void (long result);
+
   interface Functions {
     // Creates a socket of the specified type that will connect to the specified
     // remote machine.
     // |type| : The type of socket to create. Must be <code>tcp</code> or
     // <code>udp</code>.
     // |options| : The socket options.
     // |callback| : Called when the socket has been created.
     static void create(SocketType type,
                        optional CreateOptions options,
                        CreateCallback callback);
@@ skipping 118 matching lines @@
     // Retrieves the state of the given socket.
     // |socketId| : The socketId.
     // |callback| : Called when the state is available.
     static void getInfo(long socketId,
                         GetInfoCallback callback);
 
     // Retrieves information about local adapters on this system.
     // |callback| : Called when local adapter information is available.
     static void getNetworkList(GetNetworkCallback callback);
 
-    // Join the multicast group and start to receive packets from that group.
+    // Joins the multicast group and start to receive packets from that group.
     // The socket must be of UDP type and must be bound to a local port
     // before calling this method.
     // |socketId| : The socketId.
     // |address| : The group address to join. Domain names are not supported.
-    // |callback| : Called when the join group operation is done with an 
+    // |callback| : Called when the join group operation is done with an
     // integer parameter indicating the platform-independent error code.
     static void joinGroup(long socketId,
                           DOMString address,
                           JoinGroupCallback callback);
 
-    // Leave the multicast group previously joined using <code>joinGroup</code>.
-    // It's not necessary to leave the multicast group before destroying the 
-    // socket or exiting. This is automatically called by the OS.
+    // Leaves the multicast group previously joined using
+    // <code>joinGroup</code>. It's not necessary to leave the multicast group
+    // before destroying the socket or exiting. This is automatically called by
+    // the OS.
     //
-    // Leaving the group will prevent the router from sending multicast 
-    // datagrams to the local host, presuming no other process on the host is 
+    // Leaving the group will prevent the router from sending multicast
+    // datagrams to the local host, presuming no other process on the host is
     // still joined to the group.
     //
     // |socketId| : The socketId.
     // |address| : The group address to leave. Domain names are not supported.
     // |callback| : Called when the leave group operation is done with an
     // integer parameter indicating the platform-independent error code.
     static void leaveGroup(long socketId, DOMString address,
                            LeaveGroupCallback callback);
 
-    // Set the time-to-live of multicast packets sent to the multicast group.
+    // Sets the time-to-live of multicast packets sent to the multicast group.
     //
     // Calling this method does not require multicast permissions.
     //
     // |socketId| : The socketId.
     // |ttl| : The time-to-live value.
     // |callback| : Called when the configuration operation is done.
     static void setMulticastTimeToLive(
         long socketId,
         long ttl,
         SetMulticastTimeToLiveCallback callback);
 
-    // Set whether multicast packets sent from the host to the multicast 
+    // Sets whether multicast packets sent from the host to the multicast
     // group will be looped back to the host.
     //
     // Note: the behavior of <code>setMulticastLoopbackMode</code> is slightly
     // different between Windows and Unix-like systems. The inconsistency
     // happens only when there is more than one application on the same host
     // joined to the same multicast group while having different settings on
     // multicast loopback mode. On Windows, the applications with loopback off
     // will not RECEIVE the loopback packets; while on Unix-like systems, the
     // applications with loopback off will not SEND the loopback packets to
     // other applications on the same host. See MSDN: http://goo.gl/6vqbj
     //
     // Calling this method does not require multicast permissions.
     //
     // |socketId| : The socketId.
     // |enabled| : Indicate whether to enable loopback mode.
     // |callback| : Called when the configuration operation is done.
     static void setMulticastLoopbackMode(
         long socketId,
         boolean enabled,
         SetMulticastLoopbackModeCallback callback);
 
-    // Get the multicast group addresses the socket is currently joined to.
+    // Gets the multicast group addresses the socket is currently joined to.
     // |socketId| : The socketId.
     // |callback| : Called with an array of strings of the result.
     static void getJoinedGroups(long socketId,
                                 GetJoinedGroupsCallback callback);
+
+    // Allows a UDP socket to bind to an already-bound address. Note that
+    // binding two sockets to the same address leads to undefined behavior for
+    // packets not sent to a broadcast or multicast address.
+    // |callback| : Called when the operation is done.
+    static void allowAddressReuse(long socketId,
+                                  AllowAddressReuseCallback callback);
   };
 
 };